The production of heat shrinkable pipe mold is based on the requirements of rubber products design, and according to the drawings through mechanical processing of metal materials into mold entities. Under certain technological conditions. can be used mold to produce qualified rubber products. Therefore, rubber mold design and mechanical process, rubber production technology is closely related.

On the one hand, heat shrinkable tube rubber molded products according to its use of media, the use of temperature and other requirements of different selection of different plastic mold, and different rubber has different properties, different rubber mold products in the production process is not the same, so in the design of molds should fully consider the requirements of the production process of products; On the other hand, Rubber mold is not only a mechanical processing entity, but also the production cost of products factors, so mold design should consider the structure of mold parts in line with the requirements of mechanical force mouth two, and according to the amount of production of products to choose different structures, in accordance with the premise of meeting the requirements of use, to minimize the cost of mold processing. Therefore, the mold designer rubber products production process, rubber mold basic structure form and mechanical processing knowledge has a comprehensive understanding, in order to design a reasonable structure, economical and applicable phase mold.

Basic processing technology of rubber and rubber.

Rubber heat shrinkable Tube adhesive as an important material is widely used in heat shrinkable pipe, aerospace, machinery, electric vehicle and construction industry and other aspects, to meet the use of the site required sealing, wear-resistant, oil-resistant, dielectric and other requirements.

Rubber is a polymer compound, its main performance characteristics are: rubber can be divided into natural rubber and synthetic rubber. Raw rubber can not be directly used in the production of rubber products, must first raw rubber and a variety of complexes (such as reinforcing agents, anti-aging agents, chemical promoters, etc.) in accordance with certain requirements in the rubber refining machine mixing evenly, so that it becomes used in the production of a variety of rubber products mixing glue. Mixing glue under certain conditions by molding, for rubber products. The vulcanized rubber products have a high elasticity, and the heat shrinkable tubes have excellent mechanical properties as well as other performance.

There are many parameters involved in heat shrinkable double-walled tubes, such as color, shrinkage ratio, wall thickness, tensile strength and so on, and today we are introducing some of the temperatures involved in hot-shrinkable double-walled tubes.

In fact, whether it is double-walled tube or thick wall tube, or other special double-walled tube, as long as the double-walled tube, the temperature involved is nothing more than: shrinkage temperature, final shrinkage temperature, operating temperature of three items.

1. Double-walled tube shrinkage temperature;

The double-walled heat shrinkable tube is, on the surface, the temperature at which the double-walled tube begins to shrink and reflect. We take the double-walled tube to start heating, heating to the double-walled tube began to start a certain reaction when the temperature is beginning to be reflected, our general PE heat shrinkable casing began to shrink the temperature of 84 ℃ that began to have shrinkage reaction;

2. Double-walled tube final shrinkage temperature;

Refers to the end of the shrinkage at this time of the temperature, can make the double wall tube to achieve a completely shrinkage temperature, such as our double-walled tube heated to 84 °, it is not like the cow sinew, I just hold it up to how big, a let go, the cow sinew immediately completely bounce back, back to the original, and our heat shrinkable casing is not It will not be like the cow sinew immediately back to the original shape, our double-walled tube shrinkage is a gradual process, we heated the double-walled tube to 84 °, it is just a shrinkage reflection, can not make the double wall tube complete shrinkage complete, we must continue to heat, heat it to the final shrinkage temperature, if it is 120 ℃, Then it can make it shrink completely;

3. Double-walled heat shrinkable tube operating temperature;

This temperature is an important parameter through the double-walled tube, operating temperature sometimes refers to the rated temperature and high temperature heat shrinkage tube degree, refers to the casing can be normal, continuous operation of the temperature, the first two temperature refers to the processing of double-walled tubes can start to reflect the temperature, we or that Φ6 double-walled Tube example, the double-walled hot air gun When the temperature begins to reach 84 ℃, the double-walled tube begins to shrink and reflects, and then slowly shrinks to Φ5, Φ4, when the temperature reaches the final shrinkage temperature of 120 ℃, the double wall tube completely shrinks to Φ3, tightly shrinks to the object, and then the process of heating this is over, and then the cover of the double-walled tube on the To carry out normal work, its normal working environment, such as the normal operating temperature of our casing is-55 ℃ to 125 ℃, because we know that many times, products will be sold everywhere, some local environment is relatively cold, some places are relatively hot, then it has a certain scope of application, The nominal temperature of our products indicates that it can be used normally at this temperature, once the normal operating temperature is exceeded, it will not be able to guarantee the life span, may not work properly, we say here the normal temperature is the double-walled tube can play the insulation protection, beyond this temperature will not necessarily play a role.

介绍橡胶热缩管的性能与相关温度

制作热缩管模具是根据橡胶制品要求进行设计，并按照图纸通过机械加工把金属材料变为模具实体。在一定的工艺条件下.能用模具生产出合格的橡胶产品。所以，橡胶模具设计与机械工艺、橡胶生产工艺等是密切相关的。

一方面，热缩管橡胶模压制品据其使用介质、使用温度等要求的不同选择不同的胶模,而不同的橡胶具有不同的性能，不同的橡胶模制品在生产工艺上不相同，所以在设计模具时应充分考虑制品生产工艺的要求；另一方面，橡胶模具既是一种机械加工的实体，又是制品生产成本项因素，所以模具设计时应考虑模具零部件的结构符合机械力口二要求，并根据制品生产量的多少选择不同的结构，在满足使用要求的前提下，尽量减少模具加工费用。因此，模具设计者橡胶制品生产工艺、橡胶模具的基本结构形式和机械加工知识有全面的了解，才能设计出结构合理、经济适用的相模具。

橡胶及橡胶基本加工工艺.

橡热缩管胶作为一种重要的材料广泛地用于热缩管、航空航天、机械、电汽车和建筑工业等方方面面，满足使用部位所需要的密封、减耐磨、耐油、介电等要求。

橡胶是一种高分子化合物，它的主要性能特点是：橡胶可分为天然橡胶和合成橡胶。生胶不能直接用于生产橡胶制品，必须先将生胶和各种配合剂（如补强剂、防老剂、化促进剂等）按一定的要求在炼胶机中混炼均匀，使其成为用于生产各种橡胶制品的混炼胶。混炼胶在一定的条件下经成型、为橡胶制品。硫化后的橡胶制品有很高的弹性，热缩管具有优异的机械性能以及其他使用性能。

热缩双壁管所涉及的参数有很多，像颜色，收缩比，壁厚，拉伸强度等等，今天我们介绍的是热缩双壁管所涉及到的一些温度。

其实无论是双壁管还是厚壁管，抑或其它特种双壁管，只要是双壁管，所涉及的温度无非是：起缩温度，终缩温度，工作温度这三项。

1.双壁管起缩温度；

双壁热缩管从表面上来讲就是双壁管开始起收缩反映时的温度。我们拿双壁管开始加热，加热到双壁管开始起某一反应时刚刚开始有收缩反映时的温度，我们一般的PE热缩套管开始的起缩温度为84℃即开始有收缩反应；

2.双壁管终缩温度；

指的是终了收缩这时的温度，可以使双壁管达到完全收缩的温度，比如说我们双壁管加热到84°，它不像牛皮筋，我只要把它撑到多大，一松手，牛皮筋立马完完全全的弹回去，回到原装，而我们的热缩套管不是这个样子，把它加热到84°它不会像牛皮筋立马变回原来的形状，我们的双壁管收缩是一个渐变的过程，我们把双壁管加热到84°，它只是刚有收缩反映，不能使双壁管完完全全的收缩完毕，我们必须要继续加热，把它加热到终缩温度，假如是120℃，那么才能使它完全收缩；

3.双壁热缩管工作温度；

这个温度是贯穿双壁管重要的一个参数，工作温度有时也指额定温高温热缩管度，就是指套管能够正常的、连续的工作的温度，前面两个温度是指加工双壁管能够起收缩反映时温度，我们还是那Φ6双壁管举例，把双壁管用热风枪慢慢加热，当温度开始达到84℃，双壁管开始起收缩反映，然后慢慢收缩到Φ5、Φ4，当温度达到终缩温度120℃，双壁管完全收缩到Φ3，紧紧地缩在物体上面，然后加工加热这个过程就结束了，然后把套上双壁管的这个零部件安装到空调等上面，进行正常的工作，它的正常工作环境，比如说我们套管的正常工作温度为-55℃到125℃，因为我们知道，很多时候，产品会销售到各地去，有的地方环境比较寒冷，有的地方比较炎热，那么它都有一定的适用范围，我们的产品温度的标称就表明其在这个温度下都是可以正常使用的，一旦超过正常使用温度，就不一定能够保证寿命，不一定能正常工作，我们这里说的正常温度就是双壁管能够起到绝缘防护的，超过这个温度就不一定能够起到作用。